WELDED WIRE MESH FENCE SYSTEM
SINGLE FABRIC 6" x 2" x 6 GAUGE PVC COATED, STANDARD PANEL WIDTHS 8' 2"
FOR STANDARD 8' ON CENTERS AND UP TO 7’ Tall
TYPICALLY FOR A DECORATIVE FENCE APPLICATION
A. The specifications section, "General Conditions", "Special Requirements" and
"General Requirements" form a part of this section by this reference thereto and shall
have the same force and effect as if printed herewith in full.
A. This specification covers fencing materials for a complete galvanized coated welded
wire mesh fence system and gates, including accessories and installation.
1.3 REFERENCE ASTM DOCUMENTS:
A. A 307 - Specification for Carbon Steel Bolts and Studs, 60,000 PSI Tensile (414
B. A 853 - Standard Specification for Steel Wire, Carbon, For General Use
C. C 94 - Ready-Mix Concrete.
D. F 567 - Standard Practice for Installation of Chain Link Fence.
E. F 626 - Specification for Fence Fittings
F. F 900 - Specification For Industrial And Commercial Swing Gates.
G. F 1043 - Specification For Strength And Protective Coatings On Metal Industrial
Chain Link Fence Framework.
H. F1916 - Standard Specifications for Selecting Chain Link Barrier Systems with
Coated Chain Link Fence Fabric and Round Posts for Detention Applications. (For
grounding, reference only)
A. Strength requirements for posts shall conform to ASTM F 1043. The product of the
yield strength and section modulus shall not be less than that for pipe conforming to
ASTM F 1083.
B. Products shall be new from recognized, reputable manufacturers. The manufacturers
shall have a minimum of 2 years experience. Used, re-rolled or re-galvanized material is
C. Welded Wire Fabric shall be fabricated from low carbon steel wire and electronically
control welded, forming a specified mesh size.
(a.) Riverdale Mills Corp., Northbridge, MA., Tel: 1-800-762-6374
D. The wire shall conform to ASTM A 853 Grade AISI 1006, having a minimum
tensile strength of 80,000 PSI. After welding the fabric is hot-dipped, galvanized with
a minimum 1.0 oz zinc/ft² followed by a 10 mil (0.25 mm) minimum PVC coating.
1) PVC coating shall be thermally fused and adhered to a primer, which is
thermally cured onto the galvanized steel core wire.
2) PVC coating shall be applied in a continuous process.
Note: Welded mesh is measured wire center to wire center, whereas, chain link mesh openings
are measured inside to inside of the diagonal wires.
E. Fabric Heights:
1. Perimeter Fences typically up to 7 feet or as required single panel construction
6” x 2" 6 gauge. (152 mm x 51 mm x 4.877mm) panel size 8'-2" wide x required
2. If required, buried fabric separate piece 6” x 2" 6 gauge. (152 mm x 51 mm x
4.877 mm) panel size 8' – 2" x 3' high (2.489m x 0.914m)
F. Framework: Framework strength and coating shall be in accordance with
ASTM F 1043.
1. Grade A Pipe, hot-dipped galvanized Schedule 40 pipe
conforming to ASTM F 1043 Group 1A.
2. Grade B Pipe, Manufactured by cold rolling and radial
frequency welding, the steel shall conform to ASTM F
1043 Group IC with a minimum yield strength of 50,000
PSI. (344.0 MPa.). Exterior and Interior coatings shall be in
accordance with ASTM F 1043.
3. "C" post, manufactured by cold forming shall conform to
ASTM F 1043 Group II with minimum yield strength of
60, 000 PSI. (413.7MPa) "C" post size 3¼ "x 2½" x .130
wall. (83 mm x 64 mm x 3.3 mm)
4. Wind loads: Post shall withstand 70 M.P.H. minimum wind
a. Gregory Galvanizing, Canton, OH. Tel: 330-477-4800
6. Post Sizes, determined in accordance with previous
approved practices Line, terminal and gate post shall not be
less than 95% of the nominal weight conforming to (ASTM
F 1043 Group 1A, 1C. and 11.)
a. "C" Post 3¼" x 2½x 0.160 wall are acceptable
"C" line post with flat attaching bars used to secure welded
mesh to post. "C" post brackets spaced 15" o.c. also
acceptable for attaching welded mesh to "C" line post. 4"
diameter tubular post shall be used as terminal post,
exceptions may apply to gate post. (See Section 3.1-K)
1. Rail Size:
a. 1-5/8" diameter rails located at the top, and bottom of the fence.
b. "C" rails 1.625 x 1.25 x 0.80" wall are acceptable for top and bottom
c. Secure welded mesh to rails with 9 gauge tie wires (Section 2.1G 5,6,
G. Fittings and Accessories
1. Post Tops: Pressed steel or malleable iron, designed as a
weather tight enclosure for tubular post. Weather tight
enclosures not required for "C" post.
Provide one cap for each exposed tubular post end, unless
equal protection is afforded by combining post top and barbed
wire supporting arm if used. Post caps not required for "C"
2. Preformed Power Twisted Ties: Fabric attachment to rails,
9 gauge ties for fabric sizes 10.5 gauge and larger. Ties
shall be aluminized with a minimum coating of 0.40 oz.
aluminum/ft² or galvanized.
3. Tie Spacing for top rails are at intervals not exceeding 24",
(bottom rail tie spacing intervals not to exceed 12".
4. Line Post and Terminal Post Brackets: Spacing for line and
terminal posts are at intervals not exceeding 15" See
drawing for bracket locations.
PART 3 EXECUTION
A. Installation of the Framework Components shall be in accordance with ASTM F 567
when applicable and as specified herein. Larger corner posts not required for welded
B. Installation of Welded Wire Fabric components: follow the manufacturer's
1. Tolerance: Top to bottom of panel one inch post to panel misalignment
tolerance. This tolerance covers those areas where minor grade change can be
accommodated, panels are out of square, occasional workmen's oversight and post
out of plumb
C. Site Preparation: Prior to the installation, all necessary grading and cleaning on both
sides of fence shall be performed by the General Contractor or others responsible
for site grading.
1. Grading shall be done in such a manner as to provide a straight flat and
level surface, Soil or stone fill shall be thoroughly compacted
2. All excavation shall be coordinated with respect to electrical and mechanical
component installations. All existing utilities shall be located prior to starting
3 Erect the fencing in straight lines between angle points. Erect framework in
accordance with ASTM F 567 and as approved by shop drawings. All fencing
shall be grounded as shown on the drawing and as specified herein. (3.1 M).
Note: Grounding in section (3.1 M) shall be completed by electrical contractor.
D. Minimum Post Hole Diameters for 2.375" (60 mm) are 10.0" (254 mm), 2.875" (73
mm) are 12.0" (305 mm, 4.0" (102 mm) are 16" (406 mm), 6.625" (168 mm) are 24.0"
(610 mm), and 8.625" (219 mm) are 32.0" (813 mm) (Table 1 for Post Hole Depth.).
Post Hole Depth Table 1
Exposed Height Of
Line Post Corner/End Pull Post Setting Depth
6 ft. 2.375 2.375 30
1.8 m 60 mm 60 mm 762 mm
7 ft. 2.375 2.375 33
2.1 m 60 mm 60 mm 838 mm
8 ft. 2.375 2.375 36
2.4 m 60 mm 60 mm 914 mm
9 ft. 2.875 2.875 39
2.7 m 73 mm 73 mm 990 mm
10 ft. 2.875 2.875 42
3m 73 mm 73 mm 1066 mm
11 ft. 2.875 2.875 45
3.4 m 73 mm 73 mm 1143 mm
12 ft. 2.875 2.875 48
3.7 m 73 mm 73 mm 1219 mm
13 ft. 2.875 2.875 51
4m 73 mm 73 mm 1295 mm
14 ft. 4.0 4.0 54
4.3 m 102 mm 102 mm 1372 mm
15 ft. 4.0 4.0 57
4.6 m 102 mm 102 mm 1447 mm
16 ft. 4.0 4.0 60
4.9 m 102 mm 102 mm 1524 mm
Note: Posts depths shall be a minimum of 24", (610 mm) plus 3" (76 mm) for each 1 - Ft. (.305
m) increase in the fence height over 4 ft. (1.2 m) (ASTM A 567)
E. Post Holes in Solid Rock or Concrete: Drill holes into solid rock or concrete 1/2" (13
mm) wider than pipe diameter, and 18" (457 mm) deep for end, corner and gate posts and
12" (305 mm) deep for line post.
Half-fill the void with non-shrinkable grout and force the post to the bottom of the hole,
leaving no voids. Crown the grout to shed water. The use of sleeves in new concrete is
F. Concrete Mix: Shall be in accordance with ASTM C 94 with maximum 3/4" (19 mm)
aggregate, and having a minimum compression strength of 3000 PSI (20.69 MPa.) at 28
days. Concrete shall be thoroughly worked into the post holes leaving no voids.
G. Allow concrete to cure a minimum of (7 days) before installing fence fabric or fittings.
The top surface of the post footing shall have a crown water shed finish.
H. Post Spacing: Space post equal distance in the fence line to a maximum of 81' on
center (2.4 m). No terminal posts larger than line post required, except for gate post;
welded mesh requires no stretching.
I Ground Cover: After the filter fabric is installed cover zone between fences with a 5"
(127 mm) depth of crushed stone, 1" (25.4 mm) - 1½" (38 mm) #2 aggregate. The filter
fabric and stone should extend 6" (152 mm) beyond the exterior fence and up to the
J. Rails: Install rails as called for on the drawings and in these Specifications. All rails
shall be installed on the side of the fence, which is protected to provide the least access
for climbing. No corner bracing required for welded wire fabric installations
1. Top rails, with the use of 7" (178 mm) sleeve, shall run continuously through
the top caps or extension arms. Intermediate and bottom rails shall be connected
to the line and terminal post using boulevards or bands and rail ends. Attachment
bolts for bands shall be 5/16" (7.9 mm) x 1 ½ " (38 mm) carriage bolts with nuts.
2. Boulevard bolts shall be 3/8" (10 mm) minimum in diameter. Bottom rail
location shall correspond with this specification and drawings.
3. 2 way brace bands and rail ends may be used in place of boulevards.
K. Welded Wire Fabric General: Welded wire panels are fabricated to correspond
with the widths and heights specified. Welded mesh panels are attached with a
combination of brackets and tie wire in accordance with the drawing. Option (1)
Continuous flat bar drilled 12" (305 m) o.c. running top to bottom of exposed
fabric. Option 2 Preformed 1" (25.4 mm) x 10 gage (3.4 mm) thick two piece
brackets, zinc coated are secured to the line post with 5/16" (7.9 mm) carriage
bolts. Terminal post connections are comprised of tension bands. Band spacing
not exceed 15" (381 mm) for terminal post. See corner connection detail for
securing tension bands. Continuous punched "C" post and flat bar method
preferred over round post.
M. Grounding to the Earth: Grounding and bonding of the perimeter systems shall
be in accordance with the N.E.C. (National Electric Code), N.E.S.C. (National
Electric Safety Code) ASTM F 1916 and as specified herein.
1. Fences crossing power lines of 600 volts or more shall be grounded at or near
the point of crossing and at distances not exceeding 150 feet (46 m) on each side
Where electronic detection is an integral part of the fence, grounding electrodes
shall be installed at 200'. (61 m) intervals along the fence line
(For additional information consult with the electronic system manufacturer.)
2. The grounding electrodes shall be a minimum 3/4"(19 mm) diameter x 10' (3
m) long copper clad rod, driven into the earth until the top is 12 in (305 mm)
below grade. Attach a No. 2 AWG bare stranded copper conductor by
exothermically welding to the ground rods and extend underground in the
immediate vicinity of the fence post.
Secure the grounding conductor to the post with 5/16" (7.9 mm) self-tapping
galvanized or stainless steel bolts and approved copper compression terminal ends
3. After grounding connections have been completed, perform a ground resistance
test in the presence of the Owner's Representative. The ground resistance shall not
exceed 25 OHMS under normal dry conditions.
Where resistance requirements cannot be attained, install additional rods no closer
than 6'. (1.8 m) on center. Install no more than two additional rods at each
CLEANUP: UPON COMPLETION OF THE INSTALLATION, CLEAN UP ALL WASTE
MATERIAL RESULTING FROM THE FENCE CONSTRUCTION.